![IFR 2026Q Скачать руководство пользователя страница 165](http://html1.mh-extra.com/html/ifr/2026q/2026q_operating-manual_3876146165.webp)
ACCEPTANCE TESTING
7-19
Carrier error
Test procedure
(1)
Connect the test equipment as shown in Fig. 7-8.
(2)
On the UUT set source A to:
[Carr Freq]
1200
[MHz]
[RF Level]
0
[dB]
(3)
On the modulation meter select CARRIER ERROR. The FREQUENCY display will read
0.00 kHz.
(4)
On the UUT set source A to:
[FM
Devn]
100
[kHz]
[FM
ON/OFF]
[UTIL]
[Mod’n
Mode]
Press
[Down]
until “FM external” can be selected
[Select Mode] [EXIT]
[SIG
GEN]
[Select Coupling] [Ext DC Coupling] [DCFM Nulling] [EXIT]
(5)
On the modulation meter, measure the carrier frequency error displayed in the
FREQUENCY window checking that the result is within the specification shown in
Table 7-30.
(6)
Repeat (2) to (5) for source B.